Systematic Reviews
Copyright ©The Author(s) 2021.
World J Gastrointest Oncol. Nov 15, 2021; 13(11): 1813-1832
Published online Nov 15, 2021. doi: 10.4251/wjgo.v13.i11.1813
Figure 1
Figure 1 Traffic light plot showing the risk of bias of the two completed studies.
Figure 2
Figure 2 Summary plot of the risk of bias assessment of the two completed studies.
Figure 3
Figure 3 Preferred reporting items for systematic reviews and meta-analyses diagram.
Figure 4
Figure 4 Distribution of study sites.